Nice, well played response to a near disaster.
You actually got me thinking - it used to be easy to remove a metal model from its base since the metal was stronger than the plastic, but much tougher with resin or plastic. I think you've done a good job with the snow. It's nice and crisp and white. I've only tried snow bases a couple of times and it's turned out looking more slushy. Only critique I'd give would be to stop the snow further down on the large rock in front. Wind and melt would probably not leave anything more than about half way up the stone - but overall nice work and congrats on being near the end.